I believe the original Hebrew and Greek manuscripts are authentic and doctrinally inerrant.
The closest translation to a literal
word for word interpretation of the bible is the NASB
. It is an improvement of the NKJV and is more readable. It also corrects a lot of the mistranslated words in the KJV. Of course, any bible concordance can help you find the original word in the text and render a better translation but that requires work that most people just would rather not bother with...
I grew up on KJV as well and love to read it still but I prefer the NASB for in depth study. Maybe you should try reading both side by side to help you better understand the KJV scripts that are challenging for you. At first, I refused to look at anything other than the KJV but the NASB has deepened my understanding of God's word and has made clearer what was fuzzy and dark previously. Check it out... tell me what you think.